Skiving-machine.



L. MUTHER L VV. F. LAUTENSCHLAGBR.

SKIVING MACHINE.

APPLICATION FILED MAY 11, 1908.

Patented Mar. 31, 1914.

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SKWING MACHINE.

APPLICATION PILEDMAY 11, 1908.

120915753., Patented 1131.311914.

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L. MUTHER L Wj P. LAUTENSCHLAGER.

SKIVING MACHINE. APPLICATION FILED MAY 1l, 1908.

L09 15753 Patented Mar.31,1914

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in Y n the drawings accompanying t Vfication and forming a part thereof-Figure tintura santas inganna onirica,

.LORENZ MUTHER, 0F BOSTON, MASSACHUSETTS, AND,WILLIAM F. LAUTENSCHLAG-ER, OF CINCINNATI, OHIO; SAID LAUTENSCHLAGER ASSIGNOR T0l SAID MUTHER.

SEWING-MACHINE.

themas.

Specification of Letters Patent.

' Patented Mar. 31, 1914.

Application led May 11, 1908. Serial No. 432,079.

To all lwhom it may concern.'

Be it known that we, LORENZ MUTHER, of Boston, county of Suffolk, and State of Massachusetts, and WILLIAM F. 'LAUTEN- SoHLAcnR, of Cincinnati, county of Hamilton, State of Ohio, citizens of the United States, have invented certain new and useful Improvements in Skiving Machines, of which the following is a specification, reference being had to the drawings accompanyingthe same and forming a part thereof.

Our invention relates to that class of skiving machines which is provided with circular cutting knives and a feed wheel or roll to support the leather while it is being skived.

The object of our invention is to 'provide a more simple means for adjusting the cutting edge of the circular yknife with. reference to the feed roll, and guides for the leather to vary the line of the skiving cut as well as the depth of cut, and to compensate for the wear of the circular` knife.

A further object of our invention is to provide a universal adjustment of the circular knife without materially varying the position of the pulley which drives t-he shaft upon which the circular knife is mounted.

Another object of our invention is to provide for a lateral as well as longitudinall adjustment of the shaft and bearing which supports the circular presser foot or feed disk, andl to provide a longitudinal spring adjustment for the presser foot or feed disk,`

which will prevent the snatching or puckerof the leather when itis being'l skived.

e speci- 1 is a partial side elevation of the skiving machine having our improvements attached; Fig. 2 is a partial'front elevation of same; Fig. 3 `is a partial plan view of same; and Fig. 4 is a side elevation of the complete machine.

The base of the machine is designated by the numeral 1, the upper portion of the base 1 being provided with an arm 2 upon which the mechanism is mounted, to which the circular knife is attached. The base 1 is also provided `with the bearings 3, 4 and 5 in which the shaft 6 is revolubly mounted, the shaft 6 being provided with a pulley 7 on its outer` end and the feed roll 8 on its inner end. The bearing 3'has a boss 9 on its end to which is adjustably attached the guide support 10 by means of the screw l1. The guide support 10 has mounted upon it the edge guide 12 and the portion 13 which eX- tends outwardly over the feed roll and serves to vkeep the leather down upon said feed roll 8. The guide 12 has a slotted hole in its body portion throu h which the screw 14 passes, said screw 14 eing screw threaded into the support l0. By this means'- t-he guide 12 may be adjusted longitudinally. The presser finger 13 is attached to the edge guide 12 by a screw 15 and is supported by a thin sprln 16, into which is threaded a screw 17 so t at its point will bear upon the top of the edge guide 12, the screw 17 having a check nut 18 to prevent its turning when properly adjusted. The portion 13 serves as a presser foot to press the leather down upon the roll 8, its pressure being regulated by a spring 19 which is mounted on a screw 20 having an adjusting nut 21 for varying the tension of the spring 19.

22 is the circular knife having its cutting edge so positioned that the edge of leather passing through between the upper surface of the roll 8 and under the presser finger 13 leaves its edge skived or cut to the proper thickness and length of cut. The knife 22 is securedto a shaft 23 which is mounted in Abearings 24 and 25, which bearings are secured to the frame 26. The shaft 23 is so -mounted as to be adjusted longitudinally by means of the adjusting screw 27, which adjusting screw has a bearing in the portion 28 and is threaded into the ortion 29, which.

portion l29 is'secured by e screws 30, 30, to the frame 26. This longitudinal adjustment lof the shaft 23 is of the usual form and is not a part of our invention.

The frame' 26 is supported in the arm 2 upon trunnions 31, 31, which have bearingsy in holes in the said portion 2, the mounting of the frame 26 being such that it is free to oscillate upon the trunnions 31, 31, and is designed to move laterally upon said trunnions; the lateral adjustment being secured by means of the adjusting screw 32 which i's screw threaded into the frame at 33, its inner end 34 projectin beyond the frame and being provided wit a roove 35 adapted to receive a circular vdisk 36 which is formed upon the end of the frame 26. By screwing the adjusting screw 32 in and out, the frame 26 is moved laterally upon the trunnions 31, 31. The frame 26 is partially rotated upon the trunnions 31, 31, by means of an adjusting screw 37 which is threaded into a bearing 38, which bearing 38 is in turn pivoted in the portion 39 so as to partially rotate therein, and is held in position by the nuts 40 which serve as retaining and check nuts. The screw 37 is in the form of a sleeve and is provided with a pivot portion 39, and a hole passing through the part 41 to receive a stud 42 which is secured in the portion 43 of the frame 26. The part 41 is provided with retaining and check nuts 44. The end of the part of the stud 38 is split and has a binding screw 45 passing through it.

In adjusting the frame 26 the binding screw 45 is loosened and the adjusting screw 37 revolved by means of the mill nut 46, thus revolving around the ortion 41 and causing it to move longitudinally to partially rotate the frame 26. l/Vhen the frame 26 is adjusted in the proper position the binding screw 45 is tightened, thus holding the parts in the desired adjustment. When the frame 26 is adjusted laterally the stud 42 plays longitudinally back and forth in the hole in the end of the portion 41.

The pulley 47, which rotates the shaft 23, is mounted upon said shaft 23 and serves to rotate it through the medium of a belt, and is positioned so that its center is approximately in line with the axis of the trunnions 3l, 31. Hence," when the frame 26 is partially rotated on the trunnions 31, the pulley 47 does not move except to be rotated slightly as upon points on its periphery. This does not change the distance of the periphery of the pulley 47 with relation to the driving pulley 48 which serves to drive the belt to rotate said shaft 23. The pulley 48 is driven from any suitable source of power as is usual in th1s class of machines.

49 represents the feed disk which serves to assist in feeding the leather to the cir-V cular knife, the feed disk 49 being so positioned that its periphery and its under face will be positioned in proper relation to the smooth portion 50 of the roll 8. Thisfeed disk 49 serves to keep. the leather in place, and as before stated, to assist in feeding it to the circular knife. The feed disk 49 is mounted upon the shaft 51 by means of the screw 52 so as .to revolve with said shaft. Theshaft 51- has a bearing in the portion 53, its upper end passing upwardly through said bearing and into a sleeve 54, and is driven from said sleeve by means of a slot which receives a roll 55 mounted upon a pin secured in the upper end of the shaft 51. Said shaft 51 is provided with a screw 56 which receives the lower end of the spring 57, in such manner as to permit said spring 57 to freely rotate thereon, the upper end of the spring 57 being provided with a loop 58 through which the pin 59 passes to secure the upper 'end of said spring 57 to the threaded sleeve 60. The threaded sleeve 60 is threaded into the upper end of the threaded sleeve 54. This sleeve 54 has formed on its upper end the pulley 61 which serves to rotate the shaft 5l and the feed disk 49 by means of a belt, as shown in Fig. 4. The sleeve 54 is provided with the groove 62 adapted to receive the point of a screw 63.

This arrangement provides means to pre. -vent the sleeve 54 from being dislodged or moved out of its proper adjustment in the bearin 53. The bearing 53 is adjustably secure to the portion 2 through the medium of a lug 64 formed on the bearing 53, which lug is -provided with a slot 65 through which thelscrew 66 passes, vsaid screw 66 being threaded into a hole in the lug 67 which is formed on the portion 2. This method of mounting the support for the circular knife in the frame of the machine obviates the necessity of idlers or belt tighteners, and provides a practically universal adjustment of said circular knife with reference to the roll, 8. The method of mounting the feed disk 49 provides for a vertical and lateral adjustment of said feed disk as Well as for means for varying the tension of the disk upon the leather inserted between it and the roll, and for removing the spring tension entirely and partially counterbalancing the weight of the feed disk and the shaft upon which it is mounted to lighten the feed pres'- sure of said feed disk so that the leather when being skived. will not be snatched through the feed mechanism too quickly and pucker it and cause the circular knife to cut gouges or holes therein.

.In the operation of a skiving machine it is often found desirable to adjust the angle of thecircular cutting'l knife 22 with reference to the roll 8 so that skiving cuts of different widths may be made. When so adjusting the circular knife 22 it is also necessary to adjust the feed disk 49 laterally so that its edge or periphery will Contact with the material being cut or skived as near the inside edge of the cut as possible. By referring to Fig. 1 it will be seen that if the circular knife 22 is moved to the left by rotation upon the trunnions 31 it will tend to decrease the width of the skiving cut and throw the circular knife 22 upwardly from the portion 50 of the roll 8. This makes it desirable to slightly adjust the feed disk 49 laterally toward the roll 8. Likewise, movement of the knife 22 to the right by rotation upon the trunnions 31 will increase the width of the skiving cut and necessitate lateral movement of. the feed disk 49 slightly away from the roll 8.

The exact form of the mountings for the circular cutting knife and feed disk may be varied or changed Without departing from the spirit ofI our invention, the form shown being suliicient for the purpose of fully illustrating our invention.

l. In a skiving machine, a rotary cut-ting knife; a shaft upon Which said rotary cutting knife is mounted; a pulley on said shaft; a frame having bearings for said shaft; trunnions formed on said frame, having their axes in line with the center of said shaft and of said pulley; and means for adjusting said shaft laterally toward and from the feed-roll and longitudinally, and for adjusting the frame rotatively.

2. In a skiving machine, the combination with an adjustable rotary cutter of a feed disk; a rotating shaft upon Which said feed disk is mounted; means for adjusting said shaft axially; a bearing for said shaft; and means for permitting the adjustment of said bearing and feed disk laterally toward and from the feed-roll.

3.. In a skiving machine, the combination of a feed roll; an adjustable guide; an adjustable rotary cutter; and a laterally and axially adjustable feed disk.

4. In a skiving machine, the combination of an adjustable rotary cutter and a feed roll; a feed disk; a rotatable shaft upon which said feed disk is mounted; a bearing for said shaft; and means whereby said bearing can be adjusted laterally toward and from the feed roll.

In Witness Whereof,vvve have hereunto set our hands, in the presence of two subscribing Witnesses, this the second day of April, A. D. 1908.

l LORENZ MUTHER.

WILLIAM F. LAUTENSCHLAGER.

Witnesses:

A. H. SPENCER; R. V. ELLIo'rr. 

